They shut the reactor down, and then it exploded.

他们关闭了反应堆 然后就爆炸了。

Unlike water, the loss of which shuts a reactor down for lack of moderation, sodium slightly damps the chain-reaction.

与水不同的是，钠会轻微地抑制链式反应，而水的流失会导致反应堆因缺乏节制而关闭。

A month or so later, the emergency generators that help cool down nuclear reactors would fail, leading to massive nuclear meltdowns all around the world.

大约一个月后，冷却核反应堆的应急发电机将会停摆，导致世界各地大规模的核熔毁。